Air Conditioner and Furnace Tune-Up FAQs: Everything You Need to Know

Q: What is a furnace or air conditioner tune-up?

A tune-up is preventative maintenance performed by a licensed technician who inspects key components, tests performance, and checks for safety issues such as carbon monoxide levels. [1](https://reliancehomecomfort.com/learning-centre/tune-up-faqs/)

Q: Why are tune-ups important?

Tune-ups help keep equipment in good working condition, identify early issues, support consistent comfort, and reduce the chance of unexpected breakdowns. [1](https://reliancehomecomfort.com/learning-centre/tune-up-faqs/)

Q: What happens during a service visit?

Technicians call ahead, arrive prepared, wear boot covers, inspect the thermostat and equipment, perform cleaning and testing, explain any findings, and provide a written checklist. [1](https://reliancehomecomfort.com/learning-centre/tune-up-faqs/)

Q: Is cleaning the same as a tune-up?

No. Cleaning only addresses surface dirt. A tune-up includes testing gas pressure, measuring CO levels, and inspecting internal components that require a licensed technician. [1](https://reliancehomecomfort.com/learning-centre/tune-up-faqs/)

Q: What is the difference between a 12-point and a 21-point tune-up?

A 12-point tune-up covers essential components and checks for safety issues. A 21-point tune-up includes deeper inspection, testing, cleaning, and analysis of performance-related components. [2](https://reliancehomecomfort.com/tune-up/)

Q: How often should I book a tune-up?

Most homeowners book furnace and AC tune-ups annually to help maintain reliable performance. [1](https://reliancehomecomfort.com/learning-centre/tune-up-faqs/)

Q: What happens if an issue is found?

Technicians explain any concerns in easy-to-understand terms and provide options without pressure. [1](https://reliancehomecomfort.com/learning-centre/tune-up-faqs/)

TL;DR:

A detailed FAQ that explains what happens during an AC or furnace tune‑up and why regular preventative maintenance is recommended.

Key takeaways:

Tune‑ups include inspection, testing, and system checks
AC tune‑ups are typically scheduled before summer
Licensed technicians assess safety and performance factors

Regular tune-ups for your air conditioner and furnace are one of the smartest ways to help keep your home comfortable all year long. A visit from a fully licensed Reliance® technician can help keep your equipment running reliably, catch small issues early, and give you peace of mind heading into the hottest or coldest days of the year.

What is a furnace or air conditioner tune-up?

A tune-up is professional preventative maintenance for your heating or cooling system. Your technician inspects key components, tests performance, and checks for any safety concerns. For furnace tune-ups, this includes examining parts like the gas valve, igniter, heat exchanger, and venter motor, and measuring carbon monoxide (CO) levels inside the home and in the furnace exhaust.

Why are tune-ups important?

Help keep equipment in good working condition
Identify potential issues before they become bigger repairs
Support consistent comfort through every season
Reduce the chances of being left without heating or cooling during extreme weather

What happens during my Reliance service visit?

Before arriving, your technician will call ahead to confirm the appointment. Whenever possible, they’ll park on the street to keep your driveway free. Inside your home, they’ll wear boot covers and keep the workspace tidy.

Your appointment includes:

Thermostat check
Inspection of your mechanical room and equipment setup
Assessment, cleaning, testing, and optimisation of your system
A clear explanation of any findings in easy, everyday language
A written checklist and assessment at the end of the visit

For AC tune-ups, the technician may ask if you have a hose that can reach your outdoor condenser, in case a deep clean is needed.

Is cleaning the same thing as a tune-up?

No. Anyone can wipe down surface parts, but only a licensed technician can test gas pressure with a manometer, measure CO levels with a combustion analyser, and safely inspect internal components.

What’s the difference between 12-point and 21-point tune-ups?

Reliance® offers several tune-up options for furnaces and air conditioners:

12-Point Tune-Up

Inspection of 12 major components
Addressing safety concerns that may become hazards

21-Point Tune-Up

A more extensive inspection, testing, and cleaning of 21 components
Additional investigation into potential issues affecting performance

How often should I schedule a tune-up?

Most homeowners book a furnace tune-up once a year (typically before winter), and an AC tune-up once a year (before summer). This helps keep things running smoothly when you need them most. Just give us a call or use our online booking tool if you are already a Reliance customer.

What if the technician finds an issue?

If something needs attention, your technician will explain the situation clearly and offer options — no pressure and no complicated jargon.

Why choose Reliance?

Over 60 years of serving Canadians
More than 155,000 five-star user reviews on Google
Fully licensed, safety-focused HVAC and water heater technicians and electricians
As-soon-as same-day repairs, when available
24/7/365 phone support

Back to Learning Centre

Here’s How to Save Energy throughout Your Home